The original first-print releases. These are most desirable for collectors.
While PS2 bootlegs are less common than GBA or DS fakes, they do exist. Be wary of listings shipping from overseas with stock photos. Genuine PS2 discs have a specific look: buy ps2 games ebay
Buying a "lot" of 10 games and selling the ones you don't want is often cheaper than buying a single popular title like Silent Hill 2 or Metal Gear Solid 3 . The original first-print releases
This means the game includes the original case, the manual, and the disc. Missing a manual can drop the value by 20–30%. Be wary of listings shipping from overseas with stock photos
Look for photos of the underside of the disc. Light surface scratches are usually fine, but deep "circular" scratches (often caused by moving the console while the disc is spinning) can be fatal.
Early PS2 games were printed on blue-backed CDs. These are notorious for being harder for older laser units to read.